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Finding the Fourth Proportional to 619.01, 928.71 and 387.62

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Solution

The fourth proportional to 619.01, 928.71 and 387.62 is: 581.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.01 : 928.71 = 387.62 : x
  2. Step 2: Convert to fraction form
    619.01/928.71 = 387.62/x
  3. Step 3: Cross multiply
    619.01x = 928.71 × 387.62
  4. Step 4: Simplify right side
    619.01x = 359,981.93
  5. Step 5: Solve for x
    x = 359,981.93/619.01
  6. Step 6: Final answer
    x = 581.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.